public TracingHostedService(TracingDiagnosticListenerObserver diagnosticObserver, ILoggerFactory loggerFactory)
 {
     _diagnosticObserver = diagnosticObserver;
     _logger             = loggerFactory.CreateLogger <TracingHostedService>();
 }
 public TracingHostedService(TracingDiagnosticListenerObserver diagnosticObserver)
 {
     DiagnosticListener.AllListeners.Subscribe(diagnosticObserver);
 }